Removable brush head cover with threaded handle nut



Feb. 5; 1963 L. G. SCHOLL REMOVABLE BRUSH HEAD COVER WITH THREADEDHANDLE NUT Filed May 1, 1959 INVENTOR.

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3,076,217 REMOVABLE BRUSH HEAD COVER WITH THREADED HANDLE NUT Leidy G.Scholl, Perfected Broom Co., North Line St., Lansdale, Pa. Filed May 1,1959, Ser. No. 810,318 2 Claims. (Cl. 15-145) This invention relates toan improved nut for removable brush handles and more particularly to anut which will form at least partial threads on a smooth wooden brushhandle being screwed thereinto.

Heretofore, it has always presented a problem to people who use pushbrushes and the like to removably secure a handle to the head of a pushbrush in such a manner whereby the head of the brush will not be splitor otherwise be damaged and rendered useless by either the excessivetightening of the threaded handle in the head of the brush, or byapplying lateral pressure to the handle of the brush which in manyinstances causes the head of the brush to split.

A main object of this invention is to provide a removable brush headcover which may be readily applied to and removed from the head of apush-broom or the like, the cover having secured thereto an improved nutwhich will be capable of forming at least partial threads upon thatportion of a wooden handle being screwed thereinto.

A still further object, in accordance with the preceding object, is toprovide a brush head cover which may be removably secured to the head ofa push brush and have a handle portion removably secured thereto, thecover itself then absorbing the stresses which would normally besufiicient to cause irreparable damage to the head of a push brush andrender it useless. I

A final object, in accordance with the preceding objects is to providean attachment for push brushes and the like that will lend itself toconventional forms of manufacture and is sufficiently inexpensive so asto reduce the usual expense of replacing a broken brush head to aminimum.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

FIGURE 1 is a perspective view of the improved nut comprising thepresent invention shown fixedly secured to a removable head cover whichis mounted upon the head of a push brush with the brush end of thehandle therefor being positioned for engagement with the nut.

FIGURE 2 is a longitudinal vertical sectional view taken substantiallyupon the plane indicated by the section line 22 of FIGURE 1 with partsof the brush and cover being broken away, and with the bristles of thebrush removed; and

FIGURE 3 is a vertical transverse sectional view taken substantiallyupon the plane indicated by the section line 3-3 of FIGURE 2 with thehandle and the bristles of the brush being shown in phantom lines.

With attention now drawn to FIGURE 1 of the drawings, the numeralgenerally designates the improved nut comprising the present inventionwhich is fixedly secured to a removable cover generally referred to bythe reference numeral 12. The cover 12 comprises a generally elongatedmember which is substantially U-shaped in cross-section having dependingside walls 14 and depending curved end walls 16. As can best be seen inFIG- URES 2 and 3, depending side walls 14 and end walls 16 are snuglyreceived over the sides and the ends of brush head 18. The brush head 18is to be provided with a plurality of apertures 20 throughout itslongitudinal United States Patent 0 "ice length. Formed integrally withtop wall 22 of brush cover 12 and depending therefrom are fastenerswhich are generally designated by the reference numeral 24. Eachfastener 24 is generally of inverted U-sh-aped configuration having abight portion 26 and depending arms 28 which terminate in laterallyenlarged end portions 30 that are defined by flange 32 which extendlaterally from the remote surfaces of arms 28.

Formed in the top wall 22 of the cover 12 is a cylindrical pocket 34 inwhich the nut 10' is secured. Nut 10 has a lower portion 36 and anenlarged upper portion 37 defined by shoulder 39. The lower portion 36is fixedly secured in pocket 34 with shoulder 39' abutting against thetop wall 22 of the cover 12. Nut 10 may be secured fwithin cylindricalpocket 34 in any convenient manner such as by cementing.

Formed in nut 10 is an upwardly and outwardly flared threaded bore 42which has a bottom wall 44. Formed on bottom wall 44 is a convexprojection 46 which is received within the usual concave recess 47 ofthe tapered smooth end portion 48 of the brush handle 50 as it isthreadingly engaged within threaded bore 42.

It is to be understood that the preferred material for constructing thecover 12 is plastic or a similar material which is somewhat rigid andyet has resilient properties. The nut 10 may also be constructed of asimilar material, however, it is not desired to have the nut 10constructed of a material that is resilient to the point that the nutwill be incapable of rigidly securing a handle to the cover 12.

In operation, the cover 12 is placed over the head 18 of the brush withthe enlarged end portions 30 of the fasteners 24 projecting and securedthrough the lower smaller end of tapered apertures 20 by means offlanges 32. It will be noted that when the cover 12 is in position upon.the brush head 18, that the lower surface of the cylindrical pocket 34is resting upon the upper surface of the brush head 18. The smoothtapered portion 48 of the handle 50 is then threadedly engaged withinthreaded bore 42 whereby the threads of the threaded bore will form atleast partial threads on the handle 50 thereby rigidly securing thelatter to the cover 12 which now carries the brush head 18. In addition,the threaded engagement of the handle 50 with the nut 10 will slightlyflex the walls of the nut outwardly into tighter frictional engagementwith the confronting faces of the pocket 34. Thus it may be seen thatthere is no direct contact between the handle 50 and the brush head 18and that any lateral stresses applied to the handle 50 will be absorbedby the cover 12 through the nut 10. If a person while using theassembled brush should strike an object with sufficient force to dodamage to the cover 12, it is then only necessary to remove the handle50 from the cover 12 and then remove the brush head 18 from the cover 12and replace the latter which, in comparison to the brush head 18, isrelatively inexpensive.

It is to be understood that the nut 10 is to be constructed of amaterial which is sufiicien-tly rigid so as to enable a smooth taperedend portion of a handle or a straight end portion of a handle to bescrewed thereinto to form at least partial threads upon that end portionof the handle. Further, the use of the handle having a tapered endportion is desirable, although a handle having a straight end portionsmaller in diameter than the greatest diameter of tapered threaded bore42 will be equally effective.

Thus, it may be seen that herein described is a brush head cover and nutassembly which will absorb blows that would normally cause damage to arelatively expensive brush head.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A hollow removable brush head cover constructed of a relatively rigidbut resilient material adapted to be removably secured about the upperportion of a brush head and having a cylindrical pocket formed in theupper surface thereof including a bottom whose undersurface is adaptedto abut against the upper surface of said brush head, an improved nut tosecure a handle to said brush head, said nut having a lower portion andan enlarged upper portion defining an annular shoulder, said lowerportion being snugly received and fixedly secured in said pocket withthe lower surface of said shoulder abutting against the upper surface ofsaid cover and the bottom of said lower portion abutting against thebottom of said pocket, an upwardly and outwardly flaring threaded blindbore in said nut having a bottom Wall defining a closure for the lowerend of said bore, said nut being constructed of a relatively rigid butslightly resilient material whereby the threads of said tapered borewill cut at least partial threads in the tapered portion of a brushhandle secured thereinto and the securement of a handle in said nut willslightly flex the walls of said nut outwardly into tighter frictionalengagement with the confronting surfaces of said pocket.

2. The combination of claim 1 including a convex projection on the uppersurface of said bottom wall for engagement by the end of a handle seatedin said bore.

References Cited in the file of this patent UNITED STATES PATENTS1,547,464 Styan July 28, 1925 2,715,237 Trindl Aug. 16, 1955 2,835,914Littleton May 27, 1958 FOREIGN PATENTS 307,279 Switzerland Aug. 1, 1955318,162 Switzerland Feb. 15, 1957 574,738 France April 4, 1924 1,111,888France Nov. 2, 1955 1,130,504 France Oct. 1, 1956

1. A HOLLOW REMOVABLE BRUSH HEAD COVER CONSTRUCTED OF A RELATIVELY RIGIDBUT RESILIENT MATERIAL ADAPTED TO BE REMOVABLY SECURED ABOUT THE UPPERPORTION OF A BRUSH HEAD AND HAVING A CYLINDRICAL POCKET FORMED IN THEUPPER SURFACE THEREOF INCLUDING A BOTTOM WHOSE UNDERSURFACE IS ADAPTEDTO ABUT AGAINST THE UPPER SURFACE OF SAID BRUSH HEAD, AN IMPROVED NUT TOSECURE A HANDLE TO SAID BRUSH HEAD, SAID NUT HAVING A LOWER PORTION ANDAN ENLARGED UPPER PORTION DEFINING AN ANNULAR SHOULDER, SAID LOWERPORTION BEING SNUGLY RECEIVED AND FIXEDLY SECURED IN SAID POCKET WITHTHE LOWER SURFACE OF SAID SHOULDER ABUTTING AGAINST THE UPPER SURFACE OFSAID COVER AND THE BOTTOM OF SAID LOWER PORTION ABUTTING AGAINST THEBOTTOM OF SAID POCKET, AN UPWARDLY AND OUTWARDLY FLARING THREADED BLINDBORE IN SAID NUT HAVING A BOTTOM WALL DEFINING A CLOSURE FOR THE LOWEREND OF SAID BORE, SAID NUT BEING CONSTRUCTED OF A RELATIVELY RIGID BUTSLIGHTLY RESILIENT MATERIAL WHEREBY THE THREADS OF SAID TAPERED BOREWILL CUT AT LEAST PARTIAL THREADS IN THE TAPERED PORTION OF A BRUSHHANDLE SECURED THEREINTO AND THE SECUREMENT OF A HANDLE IN SAID NUT WILLSLIGHTLY FLEX THE WALLS OF SAID NUT OUTWARDLY INTO TIGHTER FRICTIONALENGAGEMENT WITH THE CONFRONTING SURFACES OF SAID POCKET.